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Magnetic resonance imaging of brain (diffusion weighted imaging sequences) in a patient with severe left ventricular systolic dysfunction and acute cognitive change. The initial images were felt to represent a multi-infarct state, presumed cardioembolic and 'watershed' (hypoperfusion) infarction. Subsequent investigations revealed that the patient had 'shared' cardiac and cerebral pathology caused by a systemic and cerebral vasculitic process.
